metamask-extension/ui/app/pages/confirm-send-token/confirm-send-token.container.js

import { connect } from 'react-redux'
import { compose } from 'redux'
import { withRouter } from 'react-router-dom'
import { clearConfirmTransaction } from '../../ducks/confirm-transaction/confirm-transaction.duck'
import { updateSend, showSendTokenPage } from '../../store/actions'
import { conversionUtil } from '../../helpers/utils/conversion-util'
import {
  getTokenValueParam,
  getTokenAddressParam,
} from '../../helpers/utils/token-util'
import { sendTokenTokenAmountAndToAddressSelector } from '../../selectors'
import ConfirmSendToken from './confirm-send-token.component'

const mapStateToProps = (state) => {
  const { tokenAmount } = sendTokenTokenAmountAndToAddressSelector(state)

  return {
    tokenAmount,
  }
}

const mapDispatchToProps = (dispatch) => {
  return {
    editTransaction: ({ txData, tokenData, tokenProps }) => {
      const {
        id,
        txParams: { from, to: tokenAddress, gas: gasLimit, gasPrice } = {},
      } = txData

      const to = getTokenValueParam(tokenData)
      const tokenAmountInDec = getTokenAddressParam(tokenData)

      const tokenAmountInHex = conversionUtil(tokenAmountInDec, {
        fromNumericBase: 'dec',
        toNumericBase: 'hex',
      })

      dispatch(
        updateSend({
          from,
          gasLimit,
          gasPrice,
          gasTotal: null,
          to,
          amount: tokenAmountInHex,
          errors: { to: null, amount: null },
          editingTransactionId: id?.toString(),
          token: {
            ...tokenProps,
            address: tokenAddress,
          },
        }),
      )
      dispatch(clearConfirmTransaction())
      dispatch(showSendTokenPage())
    },
  }
}

export default compose(
  withRouter,
  connect(mapStateToProps, mapDispatchToProps),
)(ConfirmSendToken)